A Pratically New Engine - 4.9 Deville 1995 Engine (Page 1/3)
Warlordsix JAN 04, 09:19 PM
Sometimes you get lucky. I stumbled on this 4.9 ('95 DeVille) with 24K miles on it. Practically new, so I took it home to replace the high-mile, 4.9 ('92 DeVille) in my '87 5-speed. Even was able to watch a video of it still installed and running great. Couldn't pass it up.

[ img]http://images.fieroforum.com/userimages/Warlordsix/IMG_4232%5B21207%5D.JPG[/img][img]http://images.fieroforum.com/userimages/Warlord six/12970902_10208151564843584_5689394557245061561_o%20(1).jpg[/img]

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'87 Fiero 4.9 5-speed

Skatulaki JAN 04, 10:30 PM
Do these V8's Fit and work well in a Fiero Engine cavity? or is there a lot of Modification that has to be done. Obviously it has been done, but just how much of a job is it?
Raydar JAN 04, 11:05 PM
No surgery needs to be performed to the engine compartment, other than (maybe) the removal of the dog bone bracket.
Depending upon which trans you use, you may have to only fabricate an engine mount bracket or two. (The Fiero manual trans can be used with the 4.9. So can the Fiero automatic, but there's not a lot of reasons to do that.)

There's tons of info on the forum. Poke around.

If you have any specific questions, ask.

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Raydar
88 Formula IMSA Fastback. 4.9, NVG T550

Praise the Lowered!

Warlordsix JAN 04, 11:10 PM
The Caddy 4.9 V8 is a relatively easy swap. Bolts directly to Fiero trans. Plenty of room in engine compartment. No major mods. Search the Forum for "4.9", and you will find numerous 4.9 swap threads.Neills88 has a particularly good one.
olejoedad JAN 04, 11:14 PM
Nice!
FieroMaster88 JAN 05, 09:04 PM
That engine looks super clean. šŸ‘

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88 Coupe: 2.0L Turbo 4 Cylinder, W2A, T25 Turbo, water/meth injection
84 Indy #64: Restoration Project
84 IMSA wide body SE: 3800 Swap in progress

fierobear JAN 06, 01:48 PM
Iā€™m planning a 4.9 swap soon. These pictures will be very helpful in cleaning and restoring the engine to factory look. Thanks, great post.
Dennis LaGrua JAN 11, 06:51 PM

quote
Originally posted by Warlordsix:

The Caddy 4.9 V8 is a relatively easy swap. Bolts directly to Fiero trans. Plenty of room in engine compartment. No major mods. Search the Forum for "4.9", and you will find numerous 4.9 swap threads.Neills88 has a particularly good one.



The torque of the 4.9L is not a good match for the Fiero Getrag. With even a slightly heavy foot that box is not going to last. It's more prudent to go with the transmission that GM designed to work with that engine. IMO, the auto swap is easier than the stick swap, if it replaces an original auto setup.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

olejoedad JAN 12, 06:47 AM
Getrag gearing does not match up well with the 4.9 torque.
The 85-86 four speed is a better choice, as is the Frankenstein four speed.
I would never bolt a 4.9 to a TH125C Fiero three speed auto.

I have a Seville (3.33 final) 4T60E in my 4.9 Formula.
Do not use the auto from a Deville, the gearing is terrible.

I miss having a manual trans, but the gearing is fantastic, and its always in the right gear.
Raydar JAN 12, 11:21 AM

quote
Originally posted by olejoedad:

Getrag gearing does not match up well with the 4.9 torque.
The 85-86 four speed is a better choice, as is the Frankenstein four speed.

I have a Seville (3.33 final) 4T60E in my 4.9 Formula.
Do not use the auto from a Deville, the gearing is terrible.
...



I have a NV T-550 (aka Beretta Getrag) bolted to my 4.9. It a complete blast to drive, even though the gearing is all wrong, as Joe mentioned.
It has held up quite well to the 4.9's torque, even after having broken both front side mounts. (Engine and trans.)
I don't side step the clutch, however. I try not to shock load it. That was all a result of matting the gas, with the clutch already engaged.

With all of that said, if mine had come with the 3.33 final, I may have not swapped to the manual. The Deville trans (2.97 FDR) didn't do anything quickly. I hated it.


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Raydar
88 Formula IMSA Fastback. 4.9, NVG T550

Praise the Lowered!

[This message has been edited by Raydar (edited 01-12-2020).]